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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
      *{
          color: purple;
      }
    </style>
</head>
<body>
    <h2>比武教育</h2>
    <p>xxxx</p>
    <div>通配符选择器</div>
    <span>能够选择页面内所有的元素</span>
</body>
</html>